Best Answer: I have been a police officer for almost 40 years. Just like civilian communication, police communication has evolved over the years, Before two-way radios, officers could call into headquarters on call boxes, which were located at various locations on their beats. was just wondering, how exactly did police officers communicate with one another before cellphones were widely used (early 70s era specifically)?
3 Stars. Nitroglycerin is used to treat congestive heart failure, to help prevent frequent chest pain caused by a heart condition known as angina, and to relieve pain caused by chronic anal fissures. The drug is available under the brand names Nitromist, Nitrobid, Nitro-Dur, Nitrostat, Imdur, Isordil and Rectiv.
1 Take nitroglycerin, if prescribed. 2  If you think you're having a heart attack and your doctor has previously prescribed nitroglycerin for you, take it as directed. 3  Do not take anyone else's nitroglycerin, because that could put you in more danger. 4  Begin CPR if the person is unconscious. But seek emergency help first, such as calling 911. 2  Take nitroglycerin, if prescribed. 3  If you think you're having a heart attack and your doctor has previously prescribed nitroglycerin for you, take it as directed. 4  Do not take anyone else's nitroglycerin, because that could put you in more danger.